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Exercise 6-1 The Effect of Changes in Activity on Net Operating Income (LO6-1] Whirly Corporation's contribution format income statement for the most recent month is shown below: Per Unit $ 35.00 20.00 Sales (7,900 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 276,500 158,000 118,500 55,300 $ 63,200 $ 15.00 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 100 units? 2. What would be the revised net operating income per month if the sales volume decreases by 100 units? 3. What would be the revised net operating income per month if the sales volume is 6,900 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income